Compact High-energy Efficient System for Removing Carbon Monoxide from Ambient Air on Submarines and Other Closed Manned Environments
Navy SBIR 2020.1 - Topic N201-068
NAVSEA - Mr. Dean Putnam - email@example.com
Opens: January 14, 2020 - Closes: February 26, 2020 (8:00 PM ET)
AREA(S): Ground/Sea Vehicles
PROGRAM: PMS 397, Columbia Class Program Office
Develop a compact high-energy efficient forced-air (100 cfm) system for
removing hazardous levels (less than 50 ppm) of carbon monoxide (CO) from
ambient air on submarines.
Nuclear submarines in the U.S. fleet use a central catalytic oxidation system
to remove carbon monoxide (CO), hydrogen (H2), and volatile organic compounds
(VOC) from air by converting them to carbon dioxide (CO2) and water vapor. A
high ventilation rate is generally used to prevent hazardous gases from
accumulating at their sources and is usually sufficient to prevent unsafe concentrations.
However, some isolated or poorly ventilated spaces within the submarine would
benefit from local removal of CO. Where contamination may accumulate to
hazardous levels, if not removed locally, the severity would increase if there
was a fire or failure of the central catalytic oxidation system. This SBIR
topic seeks to develop an energy efficient, compact, portable, stable, and
stand-alone system to prevent the build-up of CO in such isolated and poorly
ventilated spaces. The current “CO and H2 Burner” draws a large volume of air
from the Auxiliary Machinery Room (AMR) and catalytically removes CO by
conversion to CO2. The catalyst is only sufficiently active at elevated
temperature (500°F) in the presence of humidity. No room temperature or portable
systems exist. The proposed portable system would continually monitor its local
space and activate when necessary (i.e., greater than 50 ppm CO) to
continuously remove the CO until a local concentration of 5 ppm is attained.
The airflow through the system must be at least 100 cubic feet per minute
(cfm). The catalyst must achieve 95% removal rate over a temperature range of
15°C to 25°C and humidity in the range of 50%-80% relative humidity (RH). The
confined spaces do not have access to cooling water but will have access to
electrical power for running a fan and operating a CO sensor (115 VAC, 100 Watt
maximum). The system must operate for 10,000 hours without requiring
maintenance when 115 VAC power is available. Battery backup must be included to
allow the system to remove CO for one hour if 115 VAC electrical power is not
available. The final target maximum system weight and volume are 50 pounds
(lbs.) and 2 cubic feet, respectively. In addition, the final design must pass
shock (MIL-S-901) and vibration (MIL-STD-167) testing making it suitable for
Develop a concept for a catalytic material formulation that can achieve the CO
removal under the conditions of flow, temperature and humidity specified in the
requirements above. Demonstrate the feasibility of the concept catalyst
material to achieve the required CO removal capacity for 10,000 hours
continuous operation. The Phase I Option, if exercised, will include the
initial design concepts and plan to build a prototype in Phase II.
Develop a non-dusting engineered prototype form of the material to enable a
system design comprising a low-pressure fan as detailed in the Description.
Provide a report documenting the results of MIL-S-901D and MIL-STD-167 testing
and internal testing showing 90% removal of 50 ppm CO in an air stream at room
temperature at 80% RH (relative humidity) for 1000 hours. Conduct shock and
vibration testing at a suitable certified laboratory chosen by the proposer and
approved by NAVSEA. Provide a sample (engineered form) of the material for Navy
testing under the same conditions for 10,000 hours. (Note: Technical
requirements will be satisfied if a 90% removal rate is maintained at room
temperature for 10,000 hours with no increase in pressure drop.) Ensure that
the performance of the engineered form does not decrease if the temperature is
increased to 200°C for up to 10 minutes. Develop and submit a Phase III plan
for Navy approval.
DUAL USE APPLICATIONS: Assist the Navy in transitioning the system for Navy
use. The company may want to offer a non-militarized version for commercial or
residential use. One possible use would be in automotive repair garages. The
material developed in this SBIR topic will be useful for any system designed to
remove CO from commercial or residential buildings.
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Room Temperature Oxidation; Carbon Monoxide; Moisture Resistant Catalyst;
Poison Resistant Catalyst; Nano-Gold; Indoor Air Quality